Spring paper punch



July "29, 1947. J,A, BISHO 2,424,539

SPRING PAPER PUNCH Filed Dec. 15, 1945 IN VEN TOR.

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MM,W#\+ Wand iatenteci July 2 9,

SPRING PAPER PUNCH John A. Bishop, Woodside, N.

Johnson Research Corporation,

of New York Y., assignor to a corporation Application December 13, 1945,Serial No. 634,727

9 Claims.

The present invention relates to an improvement in punches, moreparticularly of the portable hand-operated type.

An object of the invention has been to provide an effective punch whichcan conveniently be carried around in a pocket or handbag. In knowndevices of this class where a stripper member is employed, the parts areso arranged that, unless the user exercises care, the paper or othersheet to be punched comes between the male die and the stripper insteadof between the female die and the stripper. A further object has been toprovide a punch wherein the stripper is so positioned in relation to thedies that the sheet to be punched will always come between the femaledie and the stripper; and simple means are provided to define theposition of the strip edge in relation to the dies so that thehole maybe accurately punched at a predetermined distance from said edge,Without however being limited to that distance.

A further object of the invention has been to provide a punch whereinthe die carrying parts and the stripper can be made in one piece fromlight weight sheet material without sacrificing durability or effectiveoperation.

Other objects and beneficial results in operation of my invention willappear from the following description of a preferred embodiment thereofand the drawings appended hereto and in which- Figure 1 is a top planView;

Figure 2, a bottom plan view;

Figure 3, a central longitudinal section, showing the parts in normalinoperative position;

Figure 4, a side elevation showing the parts in the position reached atthe end of a punching operation; and

Figure 5, a transverse section on of Figure 4.

As seen more clearly inFigures 3 and l, the illustrated, embodiment ofmy invention comprises a single piece of suitable material, as a' shortmetal strip for example, one end of which is bent back over the baseportion I, to form, in effect, a spring-hinged or biased arm or stripper2. The opposite end is also bent back over base portion I and in partoverlapping a portion of stripper 2 to form, in effect, a secondspring-hinged or biased, arm or female die carrier 3.

The base portion I provides a support for a male die 4, which, in theillustrated device, is conveniently formed from the material of thebase. Longitudinally extending portions of base I are deformed toprovide the stiffening ribs 5.

the line 5-5 tion or boss Base I is also provided with a circular hole 6having a deformed stiffening edge 1.

The strip-per 2 is provided with a hole 8 normally opposite and spacedfrom male die 4 and with a transversely extending end flange whichoperates as a guide 9 arranged to engage a portion of the edge of apaper sheet II or the like, to be punched, Figure 3, and thus determinethe position of the punched hole in relation to said edge.

The female die carrier 3 is provided at a portion near its outer end.with a circular opening I I presenting a die or cutting edge in positionto cooperate with the male die 4 through stripper hole 8, when thecarrier is pressed toward the base I by the thumb or a finger of theuser. The hole or opening II is surrounded by a deforma- I2 whichextends above the outer or upper normal surface of the carrier 3 andbelow the under, normal surface of said carrier. Thus, said opening II,is so positioned that, in use, the operators thumb or finger is notlikely to be injured by the male die 4 as it moves through said openingII. Said female die carrier 3 is also provided with deformations whichpresent stiff ening ribs I3 along its lateral edges.

The ends of the deformations or ribs 5 and I3 are so arranged inrelation to the bends or hinge portions formed by stripper 2 and carrier3 with base I, that the bending or hinge action is restrictedsubstantially to the material forming said bends. The stiffening ribs 5and I3 also tend to prevent or minimizelateral or twisting movement ofsaid stripper 2 and said carrier 3 in relation to base I, therebyinsuring proper operation of the punch dies and prolonging theirusefulness.

Where the stripper 2 is arranged and equipped, as shown, it operates notonly as an edge guide and to strip the punched sheet out of engagementwith the male die after punching; but also provides an effective stop tolimit the extent of movement of the female die 8 toward base I and hencethe extent to which male die 4 projects through opening I I in making apunched hole, as shown in Figures 4 and 5, for example.

To further insure durability of the dies and their effective punchingoperation, the radius of the bends I4 and the proportions andarrangement of the parts are advantageously such that when the femaledie carrier 3 is pressed down in punching, the cutting edge of thefemale die will lie substantially in the plane of the cutting edge ofthe male die, as they pass in punching, so that there will be no bindingor scraping of the parts as the female die operatively engages the maledie.

As shown in Figure 1, a hole [5 is formed in the carrier arm 3 oppositehole 6 in base I and is provided with an edge reinforcing deformationl6. Said holes 6 and I5 provide openings to receive key rings, or thelike, or means by which the punch may be hung up, as on a hook.

I claim:

1. A punch comprising a male die support, a female die support and astripper spring-hinged, respectively, at opposite ends of said male diesupport, said stripper having guide means extending therefrom at itsfree end in a direction to be engaged by a sheet of paper or otherarticle to be punched when moved into operative position in relation tosaid male and female die supports.

2. A punch comprising a male die support, a female die support and astripper, said support and said stripper being pring-hinged,respectively, at opposite ends of said male die support, and saidstripper having means at its free end positioned between said male andfemale die supports and adapted to limit the extent of movement of oneof said supports toward the other.

3. A punch comprising a male die support, a female die support and astripper spring-hinged, respectively, at opposite ends of said male diesupport, said supports each having longitudinally extending deformationsproviding reinforcing ribs arranged and adapted to restrict bending ofsaid supports substantially to the spring hinge end portions thereof. a

4. A punch comprising a strip having end portions bent inwardly towardeach other, one portion providing a stripper and the other forming afemale die support having a free end portion arranged to overlap and beseparated from a free end portion of the stripper, a female die on saidfemale die support and at one side of said stripper, and a male diearranged opposite thereto and at the other side of said stripper, saidfemale die support being biased to normally hold said female die awayfrom said male die and said stripper being biased to normally hold aportion of said stripper in position between said male die and saidfemale die and free of the same.

5. A punch comprising a strip of relatively narrow resilient sheetmaterial having a body portion and end portions bent inwardly toward andoverlapping and separated from each other, one end portion providing a,stripper having a free end and the other end portion forming a femaledie support, a female die on said female die support and a male diearranged opposite thereto on said body portion, said stripper havingguide means at its free end arranged and adapted to engage edge portionsof a sheet or the like when in position between said dies for punchingand thereby to determine the position of the punched hole in relation tosaid edge.

6. A punch comprising a strip of resilient sheet material having endportions bent inwardly toward each other, one end portion providing afemale die support and the other end portion forming a stripper, afemale die on said female die support, a male die arranged oppositethereto, and said stripper being interposed between said dies and havinga portion projecting in a direction to form a stop adapted to limit theextent of relative movement between said dies in punching.

7. A punch comprising a strip of resilient sheet metal having endportions bent inwardly toward each other and overlying a mid-portion ofsaid strip, one of said end portions providing a stripper, a female dieon the other of said end portions and a male die on said mid-portionopposite said female die, said other end portion and said midportionbeing deformed longitudinally to form edge reinforcing ribs, and saidother end portion and said stripper being biased to normally hold theirfree ends away from said mid-portion.

8. A punch comprising a resilient strip having an end portion bentinwardly toward and overlying a mid-portion and biased to normally holdthe free end of said end portion away from said mid-portion, a male dieon said mid-portion, said end portion having a deformation extending inone direction toward said male die, a hole through said deformationproviding a cutting edge for a female die opposite said male die, saiddeformation also extending in the opposite direction to form an annularboss surrounding said female die.

9. A punch comprising a strip of resilient metal including a bodyportion having a die between its ends a die support integral with saidbody portion and extending from one end thereof in acute angularrelation thereto, with a free end overlying and spaced from said die, adie carried by said free end of said die support, a stripper integralwith said body portion and extending in acute angular relation theretofrom the end of the body portion opposite to that from which said diesupport extends, and having a free apertured end disposed between, andnormally free of, said dies and in substantial alignment therewith andconstructed and arranged to lift the punched article from one of saiddies simultaneously with the retraction of the other of said dies.

JOHN A. BISHOP.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS FOREIGN PATENTS Country Date Great Britain Jan.14, 1901 Number Number

